Answer:
The answer is the first one and the last one.
Step-by-step explanation:
If an account cost $1 and each song is 1.5x. It has to be less than or equal to 25. So it would be $1 for (the account plus) 1.5x for (how many songs he buys) is less than or equal to 25 (the ammount on the gift card).
Answer:
No
Step-by-step explanation:
6^2+4^2=52
7^2=49
49 is not equal to 52, so no it is not a right triangle
Replace x with a couple of numbers, solve for Y them mark those points on the graph and connect with a line.
See picture:
Assuming the x stands for multiplication... follow the ordering rules:
First let's take care of the exponents. 4²=16 and (-6)²=36. At the same time I will add some spacing between the terms:
3x16 - 36 + 4 - 6x4
Now do the multiplications:
48 - 36 + 4 - 24
The rest is just addition and subtraction
48 - 36 + 4 - 24 = -8
Answer:
The expected change in reaction time for a 1°F increase in temperature is 4.39 hours.
The expected change in reaction time for a 8°F increase in temperature is 4.32 hours.
Step-by-step explanation:
The simple linear regression line is used to determine the changes in the dependent variables when the independent variable is changed.
The general form of the simple linear regression line is:
![y=\alpha +\beta x](https://tex.z-dn.net/?f=y%3D%5Calpha%20%2B%5Cbeta%20x)
The simple linear regression model for the reaction time of a certain chemical process based on the temperature (°F) in the chamber in which the reaction takes place is:
![y=4.40-0.01\ x](https://tex.z-dn.net/?f=y%3D4.40-0.01%5C%20x)
Here,
<em>y</em> = reaction time (in hours)
<em>x</em> = temperature (°F)
Compute the expected change in reaction time for a 1°F increase in temperature as follows:
![y=4.40-0.01\ (1^{\text{o}})](https://tex.z-dn.net/?f=y%3D4.40-0.01%5C%20%281%5E%7B%5Ctext%7Bo%7D%7D%29)
![=4.40-0.01\\=4.39\ \text{hours}](https://tex.z-dn.net/?f=%3D4.40-0.01%5C%5C%3D4.39%5C%20%5Ctext%7Bhours%7D)
The expected change in reaction time for a 1°F increase in temperature is 4.39 hours.
Compute the expected change in reaction time for a 8°F increase in temperature as follows:
![y=4.40-0.01\ (8^{\text{o}})](https://tex.z-dn.net/?f=y%3D4.40-0.01%5C%20%288%5E%7B%5Ctext%7Bo%7D%7D%29)
![=4.40-0.08\\=4.32\ \text{hours}](https://tex.z-dn.net/?f=%3D4.40-0.08%5C%5C%3D4.32%5C%20%5Ctext%7Bhours%7D)
The expected change in reaction time for a 8°F increase in temperature is 4.32 hours.